Mr. Trump: We didn’t vote for Jared. Your placing Soros business partner Jared in his current position shows your complete contempt for us. You and Jared ignore that “immigration” was settled in Nov. 2016 election with unconditional promise of a wall. Get rid of Jared, put tanks on the US border instead of Russia’s border, or resign

“This morning, the Koch Seminar Network – more often referred to as “the Koch network” or “the shadowy Koch brothers” by gravely-voiced attack ad announcers – kick off their three-day winter meeting with the government at least temporarily reopened but the landscape in Washington deeply unsettled.

Kushner has proven the network’s most valuable negotiating partner in the White House, playing a key role in the criminal justice reform legislation passed late last year. Ideas in that legislation, particularly anti-recidivism programs in federal prisoners, were the centerpiece of last year’s winter meeting.

But two of the open questions as the Koch donors gather at the luxury resort outside Palm Springs are just how much can get done in Washington with divided government [not so– entire government agrees on open borders] and the jockeying for position in 2020 starting already,and just what kind of a deal President Trump is willing to accept. [“Deal?” The deal was made in the Nov. 2016 election.] Last year Brian Hooks, president of the Charles Koch Foundation and Charles Koch Institute, applauded the administration’s proposal of “legal certainty” for Dreamers, and indicated the network hoped the administration could go a step further for the Dreamers: “A path to citizenship is enormous incentive to continue to contribute to this country.” This year, the network is expected to push for a permanent solution to the Dreamers’s current legal status.

Politics makes strange bedfellows; this will put the Koch network on the same side as many Democratic lawmakers who have decried their allegedly sinister influence for many years. [Which was for show. Everyone in the Beltway is on the same “side”-open borders]. Earlier this month, Congressional Democrats rejected the administration’s offer of three years of legislative relief for about 700,000 Deferred Action for Childhood Arrivals (DACA) program recipients in exchange for $5.7 billion in steel barriers. Democrats appear unwilling to accept a temporary reprieve for the Dreamers in exchange for a permanent structure on the border.

Immigration is certain to come up at some point during the winter meeting, but the main focus in the coming days will be the theme “unleash the potential in everyone,” with an emphasis on programs, organizations and legislative proposals that address problems such as chronic unemployment, drugs and addiction, and poverty.

The Koch network boasts, with some strong evidence, that it has become one of the most consequential forces in American politics, with what it calls a “permanent grassroots infrastructure in 36 states.” Besides the Libre Initiative, the network includes the most visible arm, Americans for Prosperity; Generation Opportunity, which focuses on Millennials; Concerned Veterans for America, which addresses veterans’ issues; and Stand Together, which endeavors to build social capital.

The previously undisclosed business relationships with titans of the financial and technology worlds are through a real-estate tech startup called Cadre that Mr. Kushner cofounded and currently partly owns.

In his disclosure form filed earlier this year, Mr. Kushner didn’t identify Cadre as among his hundreds of assets. The Journal identified his Cadre stake through a review of securities and other filings as well as interviews with people familiar with the company and Mr. Kushner’s finances.

Jamie Gorelick, a lawyer representing Mr. Kushner, said in a statement that his stake in Cadre is housed in a company he owns, BFPS Ventures LLC. His ownership of BFPS is reported on his disclosure form, although it doesn’t mention Cadre.

Ms. Gorelick said the Cadre stake is described in a revised version of his disclosure form that will be made public after it has been certified by ethics officials. She said Mr. Kushner has previously discussed his Cadre ownership with the Office of Government Ethics and that Mr. Kushner has “resigned from Cadre’s board, assigned his voting rights and reduced his ownership share.”

A spokesman for the Office of Government Ethics didn’t respond to a request to comment.

Ms. Gorelick said it is “very normal” for a financial-disclosure form to be revised and that the form was prepared by Mr. Kushner’s lawyers on his behalf. A White House spokeswoman referred questions to Mr. Kushner’s lawyer.

Trevor Potter, a Republican former chairman of the Federal Election Commission, and other ethics experts said investments such as Mr. Kushner’s ownership of Cadre typically need to be disclosed. They said Mr. Kushner didn’t appear to violate disclosure rules by not publicly reporting his business-related debts and guarantees. But they said such arrangements ideally should be disclosed, in part because they could force Mr. Kushner to recuse himself from certain issues involving the lenders.

“Anything that presents a potential for the conflict of interest should be disclosed so that the public and the press can monitor this,” Mr. Potter said.

Ethics experts’ concern is that Mr. Kushner’s business connections could jeopardize his impartiality in certain areas and that, absent disclosures, the public is in the dark about potential conflicts.

Mr. Kushner’s rapidly expanding responsibilities range from working on a Middle East peace deal to making the federal government operate more efficiently. As a senior federal official, he is bound by ethics laws that require him to recuse himself from matters that would directly affect his financial interests.

Ms. Gorelick, who was deputy attorney general in former President Bill Clinton’s administration, said Mr. Kushner will “recuse consistent with government ethics rules.”

Mr. Kushner, the 36-year-old scion of a real-estate family, agreed with federal ethics officials to divest himself of more than 80 assets after he and his wife, Ivanka Trump, were hired by her father, President Donald Trump, as senior aides. White House officials have said some of the sales were needed to avoid potential conflicts between Mr. Kushner’s far-reaching job duties and his personal financial interests.

To get off the ground, Cadre turned to a Goldman Sachs fund and a number of high-profile investors. Among them were the venture-capital firms of Mr. Thiel, Silicon Valley’s most prominent supporter of the GOP president, and Vinod Khosla, a co-founder of Sun Microsystems Inc., according to Cadre’s website. Personal backers include Chinese entrepreneur David Yu, co-founder with Alibaba Group Holding Ltd.’s Jack Ma of a Shanghai-based private-equity firm, hedge-fund manager Daniel Och and real-estate magnate Barry Sternlicht, people close to Cadre said.

Cadre has solicited money from investors for several Kushner Cos. real-estate projects, according to information sent to prospective investors and reviewed by the Journal. Jared Kushner personally has stakes in some of the real-estate projects for which Cadre has raised money, according to Cadre documents and his disclosure form.

Mr. Williams, chief executive of Cadre, said the company has been working with regulators to update its public filings to “reflect Jared’s nonoperational, nonmanagement relationship with the company, which has been in place since the inauguration.”

BFPS Ventures, the company that Mr. Kushner’s lawyer said holds his Cadre stake, is shown on his financial-disclosure form as owning unspecified New York real estate valued at more than $50 million. The form adds that “the conflicting assets of this interest have been divested.”

Beyond Cadre, some of the assets Mr. Kushner is holding on to are hard to pinpoint, partly because they are housed in entities with generic names such as “KC Dumbo Office,” according to the disclosure form.

The Journal matched many of the assets to specific real-estate investments. An analysis of the debts on those properties, using real-estate data services PropertyShark and Trepp LLC as well as property records, found ties to a broad swath of U.S. and foreign banks, private-equity firms, real-estate companies and government-owned lenders.